I have 9 wallets running at the moment. Coins do breed well but waiting for them to gain more value some day.
How much do you expect to be earning by staking 10 nos of coin?
In an ERC20 platform coin can be stored into a single wallet that is generated by myetherwallet and in my personal experience, my single wallet had been stored 10 coins as of this writing and many more coins to come in a due of a couple of months.
I recommend, create a wallet from myetherwallet for your to be able to use a single wallet with a number of ERC20 platform tokens or coins.